Sound — Science STD 9 — Question

The law of constant proportions was given by:

Work done is said to be positive when a force causes displacement:

Collenchyma mainly forms:

Why does applying spirit give us a cool sensation:

1. y = constant: Uniform motion
2. a = constant: __________

The atomicities of ozone, sulphur, phosphorus and argon are respectively:

Which of the following has an irregular or variable shape?

Choose the wrong statement:

The weight of a boy on the surface of the moon is 300N.The weight of this boy on the surface of the earth is:

Four balls, A, B, C and D displace 10mL, 24mL, 15mL and 12mL of a liquid respectively, when immersed completely. The ball which will undergo the maximum apparent loss in weight will be:

1. A
2. B
3. C
4. D